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astronomy

Kepler-90e

Kepler-90e is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Kepler-90e rather than just read about it. In short: Kepler-90e is an exoplanet orbiting the star Kepler-90, located in the constellation Draco. It was discovered by the Kepler telescope in October 2013.

Kepler-90e — main illustration
Kepler-90e — illustration

Key takeaways

  • Kepler-90e belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Kepler-90e to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Kepler-90e from memory before moving on to harder problems.

Reference excerpt

Kepler-90e is an exoplanet orbiting the star Kepler-90, located in the constellation Draco. It was discovered by the Kepler telescope in October 2013. It orbits its parent star at only 0.42 astronomical units away, and at its distance it completes an orbit once every 91.94 days.

Host star

The planet orbits a G-type star named Kepler-90, its host star. The star is 1.2 times as massive as the Sun and is 1.2 times as large as the Sun. It is estimated to be 2 billion years old, with a surface temperature of 6080 K. In comparison, the Sun is about 4.6 billion years old and has a surface temperature of 5778 K.

References

Illustrations

Kepler-90e illustration
Kepler-90e: Artist's impression of the planets of the Kepler-90 exoplanetary system compared to the eight planets of the Solar System.
Artist's impression of the planets of the Kepler-90 exoplanetary system compared to the eight planets of the Solar System.

Worked examples

Example 1 — a first encounter with Kepler-90e

Start with the simplest possible case. Write down what Kepler-90e claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Kepler-90e before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Kepler-90e ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Kepler-90e

In research
Kepler-90e appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Kepler-90e in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Kepler-90e is common in secondary-school and first-year university syllabi. It links to neighbouring topics Exoplanets discovered by the Kepler space telescope, Exoplanets discovered in 2013, Kepler-90, so understanding it makes those chapters shorter.
In everyday life
Look for Kepler-90e outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Kepler-90e in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Kepler-90e means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Kepler-90e out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kepler-90e in simple terms?

Kepler-90e is an exoplanet orbiting the star Kepler-90, located in the constellation Draco. It was discovered by the Kepler telescope in October 2013.

Why does Kepler-90e matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Kepler-90e?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Kepler-90e.

Tags

  • Exoplanets discovered by the Kepler space telescope
  • Exoplanets discovered in 2013
  • Kepler-90
  • Transiting exoplanets

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